As far as value of historical data is concerned,the two books give more study on history of agricultural economy,history of agricultural education and so on.
在史料价值上,这两本农书也有关于农业经济史、农业教育史等资料可供进一步发掘和研究。
参考来源 - 秦汉农学文献研究·2,447,543篇论文数据，部分数据来源于NoteExpress
So his notes have great value of historical data.
他的笔记蕴有极大的史料价值。
These documents preserved in good condition have a great value of historical data to us.
清代起居注册留存较完整，有很高的史料价值。
It has not only the important value of historical data, but also the value of rhetorical art.
它不但具有重要的史料价值，而且还具有重要的修辞价值。
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